EP0177886A2 - Machine d'impression flexographique ayant plusieurs unités d'encrage et cylindres imprimeurs - Google Patents

Machine d'impression flexographique ayant plusieurs unités d'encrage et cylindres imprimeurs Download PDF

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Publication number
EP0177886A2
EP0177886A2 EP85112436A EP85112436A EP0177886A2 EP 0177886 A2 EP0177886 A2 EP 0177886A2 EP 85112436 A EP85112436 A EP 85112436A EP 85112436 A EP85112436 A EP 85112436A EP 0177886 A2 EP0177886 A2 EP 0177886A2
Authority
EP
European Patent Office
Prior art keywords
forme
cylinder
forme cylinder
cylinders
central wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85112436A
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German (de)
English (en)
Other versions
EP0177886A3 (en
EP0177886B1 (fr
Inventor
Ludger Ottenhues
Heinz Wesselmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP0177886A2 publication Critical patent/EP0177886A2/fr
Publication of EP0177886A3 publication Critical patent/EP0177886A3/de
Application granted granted Critical
Publication of EP0177886B1 publication Critical patent/EP0177886B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing

Definitions

  • the invention relates to a flexographic printing machine with a plurality of inking units and forme cylinders and with at least one counter-pressure cylinder driven by a central wheel, with which the forme cylinder gears mesh during printing operation, the forme cylinders being mounted on forme cylinder slides which are arranged on guides of the machine frame arranged approximately tangentially to radially to the central wheel the impression cylinder for printing operation can be adjusted and removed from it, and the anilox rollers of the inking units, whose anilox roller gears mesh with the forme cylinder gearwheels, can be moved on inking unit slides in guides of the forme cylinder slides.
  • the form cylinders have to be changed after each print job, whereby the respective print formats can also change.
  • the number of forme cylinders to be changed depends on the number of colors to be printed.
  • the shapes of each forme cylinder must be aligned with each other in such a way that the web running through the flexographic printing machine is printed in a register-appropriate manner. It therefore means a particular problem to bring the forme cylinder into engagement with the central wheel as quickly as possible via the forme cylinder gearwheels so that printing can be carried out correctly, so that printing can be started after the shortest possible changeover time and longer downtimes of the expensive printing press are avoided.
  • an adjustment device is known in a flexographic printing press of the type specified in DE-OS 33 05 095, with which the forme cylinder gearwheels are connected to the forme cylinder outside the printing machine leave that after lifting into the flexographic printing machine take a position on the previously aligned central wheel, that the gears of all forme cylinders can be brought into proper engagement with the central wheel by the forme cylinder slide.
  • the forme cylinder shaft is provided with a keyway, onto which a surface line of the forme cylinder is projected and which thus forms the reference point for the alignment of the forme cylinder.
  • the adjusting device is provided with a corresponding shaft spline on which a bushing provided with an external spline toothing can be pushed, which has a centering bolt which can be inserted into the spline and a clamping ring.
  • a second socket with internal splines can be pushed, with which the Forme cylinder gear is rotatably connected.
  • a third bush is pushed onto this second bush, which is fastened via a clamping ring and is provided with a catch recess on its circumference, through which the angular position to the centering bolt is determined.
  • the adjusting device first aligns the centering bolt on the keyway in such a way that the toothing is correctly aligned with the shape of the forme cylinder if the coupling to the central wheel would take place by shifting on diameter lines.
  • the forme cylinders are arranged tangentially offset to the central wheel.
  • the third bush is therefore clamped with the second bush in a position which corresponds to the respective phase shift due to the tangential offset of the forme cylinders.
  • the first bush After tightening the first bush on the respective shaft journal of the forme cylinder, it can be properly aligned in the flexographic printing machine to the central wheel by rotating it until the locking recess in the third bush engages in the corresponding locking bolt arranged in the correct position in the machine frame.
  • the object of the invention is therefore to provide a flexographic printing machine of the type specified at the beginning, the form rollers of which can be exchanged more easily and with greater certainty for a set of new, form-oriented form rollers.
  • this object is achieved in that the forme cylinders or forme cylinder gearwheels are provided with projections or hubs which are central to the forme cylinder axis and which have latching holes on their jackets on circumferential lines which are axially offset from one another and correspond to the number of forme cylinders, in such a way that the forme cylinder slides with extendable or extendable.
  • schwenkbarew locking bolts are provided, which are each offset in radial planes so that each in the locking hole of the associated forme cylinder, which is determined by the respective axial offset of the locking hole, can occur that the locking holes for each forme cylinder are arranged such that the forme cylinders fixed by this and the locking bolts on the forme cylinder slides can be inserted into the toothing of the central wheel, which is aligned in their fitting position, with molds aligned with one another for a register-appropriate pressure.
  • each forme cylinder is provided with a special track corresponding to its position relative to the printing press, on which the locking hole is arranged in the correct position relative to the printing forme, so that an exchange of the plate cylinder and an installation with an incorrect angular position to the - are excluded central wheel.
  • Alignment of the locking hole on the correct track takes place when the forme cylinder is loaded with the molds. The molds are set up and fastened with the greatest care, so that it does not require any special additional effort to determine the correct angular position of the locking hole with respect to the molds.
  • the forme cylinder gearwheels which are fixed at the correct angle on the forme cylinder slide, can only be inserted into the teeth of the central wheel without problems if the latter is also aligned in its fitting position with the forme cylinder gearwheels.
  • the orientation of the central wheel in its - a pivotable in its radial plane lever is mounted in the machine frame seated position, a swing-in at the free end in the toothing of the central Pinion, which is frictionally connected to the lever for generating a braking torque, is mounted in such a way that a shorter second lever pointing in the direction of the pivot axis of the lever is connected to the pinion, at the free end of which a pressure-piston-cylinder unit is articulated, the other end is mounted in the machine frame that the braking torque is so large that the lever is pivoted by the pressure-piston-cylinder unit until the pinion abuts against the central wheel before the second lever turns the pinion,
  • the pressure-piston-cylinder unit pivots the first lever against the central wheel until the teeth of the pinion abut the teeth of the central wheel and are supported on the latter.
  • the second lever rotates the pinion so that the teeth of the pinion engage with the teeth of the central wheel, if this had not already occurred during the first approach.
  • the pinion rotates the central wheel to a predetermined position, which is determined by the extended position of the pressure-piston-cylinder unit. In this position, the toothing of the central wheel is aligned with the forme cylinder gearwheels in such a way that they can be moved into engagement with the central wheel without interference.
  • a brake lining acted upon by a spring expediently acts on the pinion, the pretension of which can be changed by an adjusting screw.
  • the anilox roller does not have to be oriented at the correct angle to the forming roller, but the anilox roller gears have to assume a position relative to the forming roller gears that the toothing can be brought into engagement with one another by the inking unit slide.
  • a segment-shaped carrier is mounted concentrically to the anilox roller gear on each inking unit slide, in which radially extendable pins are mounted with heads retractable between the teeth of the anilox roller gear, and that attack the heads offset by a fraction of their number via a pitch circle division on the toothing.
  • a predetermined pin must engage with its head in the toothing of the anilox roller gear in question. Once this intervention has taken place, the gears can be moved together, the error corresponding at most to the fraction of the pitch circle division corresponding to the number of pins. This error can be accepted, since the number of pins is at least so large that tooth heads cannot meet.
  • the other pins are retracted with their tooth heads one after the other in order to pre-align the relevant anilox roller gear.
  • the first head which engages between two teeth, rotates the anilox roller gear according to its position, the following pins causing further rotations, so that, in the intended order of the pins, the pin causing the correct alignment must engage between two teeth. If the pin lying in front of the aligning pin engages between two teeth, the aligning pin also engages between two teeth with a slight twisting of the anilox roller gear.
  • the frame 1 of the flexographic printing machine is equipped with six consoles 2.
  • Each of the brackets 2 initially carries a carriage 3 which has a bearing 4 at its front end.
  • This Bearing 4 carries the axis 5 of the forme cylinder 6, the partial.
  • Circle of the forme cylinder gear 7 has the same diameter as the forme cylinder 6.
  • a hub 8 is fixedly connected, which has a plurality of axially offset grid holes distributed over the circumference.
  • the number of these raster bores corresponds to the number of printing units or forme cylinders belonging to a printing press.
  • six forme cylinders are provided.
  • the holes 9 are therefore distributed on six axially offset tracks on the forme cylinder hubs.
  • the carriage 3 has two hinge pins 10 and 11, wherein an angled locking lever 12 is pivotally mounted about the hinge pin 10.
  • a pneumatic cylinder 13 is pivotally mounted on the pin 11 of the forme cylinder slide, the piston rod of which engages an arm of the latching lever 12. With the end of the free arm of the locking lever 12 facing away from the hinge pin 10, a locking pin 14 is connected, which is aligned axially so that the locking pin can only engage in one of the locking bores 9 with a corresponding rotation of the forme cylinder gear. If a forme cylinder 6 has consequently been exchanged for another, the forme cylinder need only be rotated by hand until the corresponding latching pin 14 engages in the associated latching bore 9. The forme cylinder gear of the forme cylinder 6 has then reached the desired preset angular position .
  • a carrier-like segment 18 is fixedly connected to the inking unit carriage 17, which carries the anilox roller 16 and is arranged to be movable on the forme cylinder carriage 3, concentrically with the anilox roller gear 15.
  • This segment 18 has four pneumatic cylinders 19, the piston rods of which have positioning pins 20, 21, 22 and 23 at their front ends.
  • the arrangement of the cylinder 19 on the segment is such _ that a particular positioning pin which is previously fixed, has to be retracted in the case illustrated, the positioning pin 21 in its extended position in a tooth gap of the screen roller gear 15 °. If this is the case, as shown in FIG. 5, the anilox roller gear 15 is aligned with the forme cylinder gear 7. But since the anilox roller gear 15 can assume any position, it often happens that the positioning pin 21 does not meet a tooth gap.
  • the remaining positioning pins 20, 22 and 23 are moved out in a certain order one after the other, whereby the anilox roller gear 15 is rotated by a small step in each case, so that the positioning pin 21, which is the last of the four positioning pins is extended, can certainly snap into a tooth gap, the positioning pin 21 possibly rotating the anilox roller gear 15 when it finally penetrates into the tooth gap by a small amount.
  • the anilox roller 16 and thus also the anilox roller gear 15 continue to run in the “print-off position”. In such a case, it is sufficient to extend the positioning pin 21 immediately without having previously operated the remaining pins 20, 22 and 23 for presetting. Because of the rotation of the anilox roller gear 15, the positioning pin 21 selects a tooth gap. The continuation of the anilox roller 16 by a separate drive is still ensured because a freewheel 24 is arranged between the anilox roller gear 15 and the shaft of the anilox roller 16. If the forme cylinder gear 7 and anilox roller gear 15 are now approximately aligned with one another, the inking unit carriage 17 is moved in the direction of the forme cylinder gear 7 until the tips of the teeth of the forme cylinder gear 7 and the anilox roller gear 15 just overlap.
  • the positioning pin 21 is retracted and the carriage 17 is moved in the direction of the forme cylinder gear 7 until the teeth come into full engagement. Because of this retracting movement, the anilox roller gear is then possibly rotated by an angle by the format gear, because the alignment of the anilox roller gear 15 with the forme cylinder gear 7 can only correspond to the accuracy of a quarter-pitch division due to the presence of only four positioning pins.
  • FIGS. 2 to 4 now show a possibility of centering the central wheel 25 itself.
  • a fixed bearing point 26 is provided below the central wheel 25, on which two levers 27 are mounted parallel to each other at a distance. At their ends opposite the bearing point 26, these levers 27 receive an axis 28 which carries a pinion 29.
  • the hub 30 of this pinion 29 is firmly connected to a fork 31 which carries a cross head 32 at its free end.
  • the piston rod 33 of a pneumatic piston-cylinder unit 34 is connected to the crosshead 32.
  • two brake disks 35 are placed on the axle 28 between the hub 30 and the levers 27.
  • the friction between the two levers 27, on the one hand, and the hub 30, on the other hand, can be adjusted as required by a compression spring 36 and a screw 37 that excites this. If the piston rod 33 now moves upward from its position shown in FIG. 2, a tooth of the pinion 29 either hits one Tooth gap of the central wheel 25 or the tooth tip of a tooth of the central wheel 25.
  • the anilox roller wheel 15 is preset by the positioning pins 20 to 23 except for a quarter of a tooth pitch. As soon as these three presettings have been made, the gear wheels (central wheel, format wheel, anilox roller wheel) can be moved into each other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
EP85112436A 1984-10-10 1985-10-01 Machine d'impression flexographique ayant plusieurs unités d'encrage et cylindres imprimeurs Expired - Lifetime EP0177886B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843437216 DE3437216A1 (de) 1984-10-10 1984-10-10 Flexodruckmaschine mit mehreren farbwerken und formzylindern
DE3437216 1984-10-10

Publications (3)

Publication Number Publication Date
EP0177886A2 true EP0177886A2 (fr) 1986-04-16
EP0177886A3 EP0177886A3 (en) 1988-06-01
EP0177886B1 EP0177886B1 (fr) 1990-08-16

Family

ID=6247596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112436A Expired - Lifetime EP0177886B1 (fr) 1984-10-10 1985-10-01 Machine d'impression flexographique ayant plusieurs unités d'encrage et cylindres imprimeurs

Country Status (7)

Country Link
US (1) US4602562A (fr)
EP (1) EP0177886B1 (fr)
JP (1) JPS6194760A (fr)
CA (1) CA1249481A (fr)
DE (1) DE3437216A1 (fr)
DK (1) DK163871C (fr)
ES (1) ES8608408A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2624432A1 (fr) * 1987-12-11 1989-06-16 Windmoeller & Hoelscher Imprimeuse
WO2003066332A2 (fr) * 2002-02-05 2003-08-14 Windmöller & Hölscher Kg Dispositif et procede pour corriger une erreur d'alignement longitudinal resultant d'un reglage de position
EP2902200A1 (fr) * 2013-12-25 2015-08-05 I. Mer Co., Ltd. Appareil d'impression

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988007448A1 (fr) * 1987-03-24 1988-10-06 Sillars Ian Malin Appareil d'impression de tables de nombres quasi aleatoires
DE3733375A1 (de) * 1987-10-02 1989-04-13 Metronic Geraetebau Flexo-druckeinheit
US4953461A (en) * 1988-05-20 1990-09-04 Harris Graphics Corporation System for continuously rotating plate a blanket cylinders at relatively different surface speeds
DE4001735A1 (de) * 1990-01-22 1991-07-25 Windmoeller & Hoelscher Vorrichtung zum verfahren von wellen lagernden lagerboecken
DE4017285A1 (de) * 1990-05-29 1991-12-05 Windmoeller & Hoelscher Druckmaschine, vorzugsweise flexodruckmaschine
DE4308492A1 (de) * 1993-03-17 1994-09-22 Windmoeller & Hoelscher Druckmaschine
DE4308711C2 (de) * 1993-03-18 1997-05-15 Windmoeller & Hoelscher Vorrichtung zum Verfahren von auf Schlitten befestigten und Wellen lagernden Lagerböcken
ES2128892B1 (es) * 1995-04-28 2000-01-16 Comexi Sa Maquina para la impresion flexografica en varios colores con prerregistro automatico de impresion de los distintos colores.
US5770907A (en) * 1995-08-14 1998-06-23 Itt Automotive Electrical Systems, Inc. Windshield wiper motor for use in a vehicle and method for manufacturing
US5826509A (en) * 1995-10-18 1998-10-27 Deneka; P. Kenneth Printing coating head device
US5616182A (en) * 1995-12-04 1997-04-01 Itt Automotive Electrical Systems, Inc. Method and apparatus for wiping a windshield
US6040667A (en) * 1995-12-12 2000-03-21 Valeo Elecrical Systems, Inc. System and method for driving wipers in a windshield wiper system
DE19611048A1 (de) * 1996-03-20 1997-09-25 Windmoeller & Hoelscher Druckmaschine, vorzugsweise Flexodruckmaschine
DE19716943A1 (de) * 1997-04-22 1998-11-05 Windmoeller & Hoelscher Verfahren zur Steuerung der Drehzahl der Druckzylinder einer Druckmaschine
DE10136401A1 (de) 2001-07-26 2003-02-13 Windmoeller & Hoelscher Flexodruckmaschine
DE10209536B4 (de) * 2001-11-12 2006-11-02 Fritz Achelpohl Druckmaschine, vorzugsweise Flexodruckmaschine
DE10211328B4 (de) 2002-03-14 2005-05-19 Windmöller & Hölscher Kg Vorrichtung zum Anstellen einer Walze an ein sich im wesentlichen mit der Umfangsgeschwindigkeit der Walze bewegtes Widerlager mittels einer Spindel-Spindelmutter-Paarung
DE102015108126A1 (de) * 2015-05-22 2016-11-24 Windmöller & Hölscher Kg Druckmaschine sowie Verfahren zur Anstellung mehrerer Farbwerke einer Druckmaschine
CN105882112A (zh) * 2016-04-29 2016-08-24 元亨利云印刷科技（上海）有限公司 一种双工位多功能轮转印刷机组

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983808A (en) * 1971-12-02 1976-10-05 Chromax Ltd. Method and apparatus for applying flexographic printing plates to the printing cylinders of a multi-cylinder printing machine
GB2111912A (en) * 1981-12-22 1983-07-13 Windmoeller & Hoelscher Flexographic printing press

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026798A (en) * 1960-03-15 1962-03-27 George O Frostad Printing apparatus
US3163109A (en) * 1963-01-21 1964-12-29 Faustel Inc Interchangeable gear drive means for rotary printing mechanism
US3173360A (en) * 1963-08-29 1965-03-16 Rice Barton Corp Roll assembly and disassembly means for rotary print machine
DE2941521C2 (de) * 1979-10-12 1982-11-25 Windmöller & Hölscher, 4540 Lengerich Verfahren zum Austauschen der Formzylinder einer Flexodruckmaschine
DE3305095A1 (de) * 1982-02-22 1983-09-01 Paper Converting Machine Co., 54305 Green Bay, Wis. Verfahren und vorrichtung zum einstellen einer druckpresse

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983808A (en) * 1971-12-02 1976-10-05 Chromax Ltd. Method and apparatus for applying flexographic printing plates to the printing cylinders of a multi-cylinder printing machine
GB2111912A (en) * 1981-12-22 1983-07-13 Windmoeller & Hoelscher Flexographic printing press

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2624432A1 (fr) * 1987-12-11 1989-06-16 Windmoeller & Hoelscher Imprimeuse
WO2003066332A2 (fr) * 2002-02-05 2003-08-14 Windmöller & Hölscher Kg Dispositif et procede pour corriger une erreur d'alignement longitudinal resultant d'un reglage de position
WO2003066332A3 (fr) * 2002-02-05 2004-01-15 Windmoeller & Hoelscher Dispositif et procede pour corriger une erreur d'alignement longitudinal resultant d'un reglage de position
US7100509B2 (en) 2002-02-05 2006-09-05 Windmoeller & Hoelscher Kg Device and method for correcting a longitudinal register error which is caused by position adjustment
EP2902200A1 (fr) * 2013-12-25 2015-08-05 I. Mer Co., Ltd. Appareil d'impression
RU2672024C2 (ru) * 2013-12-25 2018-11-08 Ай. МЕР КО., ЛТД Печатающее устройство

Also Published As

Publication number Publication date
DK462785D0 (da) 1985-10-09
US4602562A (en) 1986-07-29
CA1249481A (fr) 1989-01-31
EP0177886A3 (en) 1988-06-01
DK163871B (da) 1992-04-13
JPS6194760A (ja) 1986-05-13
DE3437216C2 (fr) 1990-02-08
DK462785A (da) 1986-04-11
DE3437216A1 (de) 1986-04-10
ES8608408A1 (es) 1986-07-16
ES547731A0 (es) 1986-07-16
DK163871C (da) 1992-09-14
EP0177886B1 (fr) 1990-08-16

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